mirror of
https://github.com/freedombox/FreedomBox.git
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156 lines
5.1 KiB
Python
156 lines
5.1 KiB
Python
#
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# This file is part of Plinth.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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"""
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Plinth module to configure a firewall
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"""
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from django.contrib.auth.decorators import login_required
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from django.template.response import TemplateResponse
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from gettext import gettext as _
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import logging
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import actions
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import cfg
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import service as service_module
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LOGGER = logging.getLogger(__name__)
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def init():
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"""Initailze firewall module"""
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menu = cfg.main_menu.find('/sys')
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menu.add_item(_('Firewall'), 'icon-flag', '/sys/firewall', 50)
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service_module.ENABLED.connect(on_service_enabled)
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@login_required
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def index(request):
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"""Serve introcution page"""
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if not get_installed_status():
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return TemplateResponse(request, 'firewall.html',
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{'title': _('Firewall'),
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'firewall_status': 'not_installed'})
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if not get_enabled_status():
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return TemplateResponse(request, 'firewall.html',
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{'title': _('Firewall'),
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'firewall_status': 'not_running'})
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internal_enabled_services = get_enabled_services(zone='internal')
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external_enabled_services = get_enabled_services(zone='external')
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return TemplateResponse(
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request, 'firewall.html',
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{'title': _('Firewall'),
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'services': service_module.SERVICES.values(),
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'internal_enabled_services': internal_enabled_services,
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'external_enabled_services': external_enabled_services})
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def get_installed_status():
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"""Return whether firewall is installed"""
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output = _run(['get-installed'], superuser=True)
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return output.split()[0] == 'installed'
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def get_enabled_status():
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"""Return whether firewall is installed"""
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output = _run(['get-status'], superuser=True)
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return output.split()[0] == 'running'
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def get_enabled_services(zone):
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"""Return the status of various services currently enabled"""
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output = _run(['get-enabled-services', '--zone', zone], superuser=True)
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return output.split()
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def add_service(port, zone):
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"""Enable a service in firewall"""
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_run(['add-service', port, '--zone', zone], superuser=True)
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def remove_service(port, zone):
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"""Remove a service in firewall"""
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_run(['remove-service', port, '--zone', zone], superuser=True)
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def on_service_enabled(sender, service_id, enabled, **kwargs):
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"""
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Enable/disable firewall ports when a service is
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enabled/disabled.
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"""
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del sender # Unused
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del kwargs # Unused
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internal_enabled_services = get_enabled_services(zone='internal')
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external_enabled_services = get_enabled_services(zone='external')
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LOGGER.info('Service enabled - %s, %s', service_id, enabled)
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service = service_module.SERVICES[service_id]
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for port in service.ports:
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if enabled:
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if port not in internal_enabled_services:
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add_service(port, zone='internal')
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if (service.is_external and
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port not in external_enabled_services):
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add_service(port, zone='external')
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else:
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# service already configured.
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pass
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else:
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if port in internal_enabled_services:
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enabled_services_on_port = [
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service_.is_enabled()
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for service_ in service_module.SERVICES.values()
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if port in service_.ports and
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service_id != service_.service_id]
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if not any(enabled_services_on_port):
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remove_service(port, zone='internal')
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if port in external_enabled_services:
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enabled_services_on_port = [
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service_.is_enabled()
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for service_ in service_module.SERVICES.values()
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if port in service_.ports and
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service_id != service_.service_id and
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service_.is_external]
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if not any(enabled_services_on_port):
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remove_service(port, zone='external')
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def _run(arguments, superuser=False):
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"""Run an given command and raise exception if there was an error"""
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command = 'firewall'
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LOGGER.info('Running command - %s, %s, %s', command, arguments, superuser)
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if superuser:
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output, error = actions.superuser_run(command, arguments)
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else:
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output, error = actions.run(command, arguments)
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if error:
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raise Exception('Error setting/getting firewalld confguration - %s'
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% error)
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return output
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